Is there any way to do mock argument capturing in Spock

Question

I have looked around and tried different things to no avail. The examples out there on the interwebs are few, and IMHO pretty simple. My use case:

(the 'itocNetworkHandler' below is the mock)

when: "we're doing stuff"     StandardResponse response = cms.doCardStuff("123", "111", order) .... then: "we get proper calls and response object"     1 * cms.itocNetworkHandler.doNetworkCall(             { it instanceof ReplacementRequestRecord             }, StandardResponseRecord.class) >> record 

I would like to store away the parameter ('it') to the "doNetworkCall" on the mock.

The reason i want the parameter is because the object i'm testing is supposed to take my in parameters, do stuff, create a new object and pass that one to my mock. I want to make sure that the created object looks the way its supposed to.

Pointers much appreciated.

Answer 1

You can capture an argument as follows:

// must be declared before when-block (or inside Specification.interaction {}) def captured  when: ...  then: 1 * mock.doNetworkCall(...) >> { record, recordClass ->      // save the argument     captured = record     ... } // use the saved argument captured == ... 

That said, often there is a simpler solution such as checking the expected record right in the argument constraint (e.g. ...doNetworkCall( { it == ... } )).